Hello David,
Humm, what time difference do we have? seems like they're up in Tucson
around the same time as here in NSW!
I did in fact take all of that into account, that's why I mentioned
I'd be happy to get 14dB dimming out of it (20 - 6)
The battery can be purchased through element14 or
On 29 Jan 2012, at 21:13, David Forbes wrote:
ENIAC was a very interesting computer. It was essentially an adding
machine, built with vacuum tube decimal counting wheels. Each
decade was a ring counter with a count up command. Numbers
traveled through the machine as series of pulses, one
On 29 Jan 2012, at 21:11, Nick wrote:
I contributed some rare(ish) dekatrons to that project from my
collection - ones they didn't have and approached me for.
Never even got a thank you...
Nick
That's terribly bad manners, Nick. Well done for contributing though.
John S
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Hello Frank,
:-) Well, Frank Bemelman from Lisse (which is about 5km from where I
was born). I think there is a difference between 'showing off' or
being passionate about something.
I do not just start designing a circuit without a proper background
check of the used technology. Most things I
I think the chips should remain under the soldering iron
M
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On Jan 30, 4:49 am, David Forbes dfor...@dakotacom.net wrote:
On 1/30/12 12:06 AM, Cobra007 wrote:
snip
One thing about Nixie tubes that you may not be aware of is that they
need some time to start firing, because the plasma is triggered by an
external source of energy such as a photon from
Wow Frank, whilst we could accuse Michel of being 'over exuberant' I
don't think (I hope our fellow forum members) there is any need to be
rude! How about doing our best to keep it polite and friendly?
Michel I wish you the best in your venture and look forward to seeing
your results, you are
One thing about Nixie tubes that you may not be aware of is that they need
some time to start firing, because the plasma is triggered by an external
source of energy such as a photon from the room lighting or a stray cosmic
ray. The less ambient light there is, the more time they need to
Maybe dump the caps via an inductance [hopefully low R losses?].
Maybe monitor the current and switch it off as some of the H-bridge motor
drivers do? Except that uses some wasteful circuitry to achieve it.
John K.
- Original Message -
From: John Rehwinkel jreh...@mac.com
Following in Mike Moorress' footsteps... I finally finished my 230V
operation all valve dekatron spinner
http://www.sgitheach.org.uk/spinner2.html
Enjoy
Grahame
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But this may not be the case for very short PWM pulses, as the oscilloscope
reveals a millisecond or two of variation in the voltage - ionization delay
in a multiplexed tube.
I'd be interested in seeing how much that variation varied with voltage. I'd
also be interested in seeing if
On 1/28/12 12:57 PM, kay486 wrote:
Id really like to see the finished watch! It would be really awesome
if somebody made new tubes using modern technology so they could have
much smaller digits, and being able to have them lit all the time,
just like normal digital watches.
Cant wait to see
P .. r .. e .. t .. t .. y .. !
I like it. Good Job there Grahame.
I gotta start making my own PCBs. I sorta did back in the 70s, but
those used them special Radioshack etch resist markers. They could've
been been plain old 'Sharpies' as far as I know.
On Jan 30, 8:06 am, Grahame Marsh
Following in Mike Moorress' footsteps... I finally finished my 230V operation
all valve dekatron spinner
Wow, your EB91s are tall! The 6AL5s I see are all stubby little things. Maybe
the European maker didn't want to stock a different-size envelope.
- John
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On 1/28/12 3:42 AM, Cobra007 wrote:
Hello everybody here in the neonixie group.
My name is Michel, dutch from origin and living in Australia for
nearly 9 years now.
I played around with the tubes and batteries and found a way to reduce
the size, improve the design and get better battery life at
On 1/30/12 9:06 AM, Grahame Marsh wrote:
Following in Mike Moorress' footsteps... I finally finished my 230V
operation all valve dekatron spinner
http://www.sgitheach.org.uk/spinner2.html
Enjoy
Grahame
Nice spinner! I like it when people go the extra mile for retro
authenticity, just to
Wow, your EB91s are tall! The 6AL5s I see are all stubby little things. ...
- John
May its an æsthetics thing. If you look at the internal structure. The
metal bits only occupy half of the height. The currently used tubes
are the same height of the trigger tube. I have a couple 6AL5s that
:-) Well, Frank Bemelman from Lisse (which is about 5km from where I was
born).
Lot a cheese heads in this bunch (not the ones from Wisconsin). I
too, was born in the Netherlands. About 10mi (15Km) north of Eindhoven
(Phillips HQ). Though I've spent 50, of my 53 years, here in the Los
Angeles
Hello there, can somebody tell me where to find these tubes? I know
that i can just remove the coating from the red filter equvalents (i
have over 25 Z566M) but it would piss me off that they wouldnt have
the original stamps on back, and i feel its kina a waste of the tubes
because all have really
I know this is sacrilege, but when I bought my first set of Z568's back in
the day, I stripped the red coating off of them for my clocksif you're
going to keep the tubes in a clock and enjoy the orange glow, does it
really matter if the numbers aren't on the back? ;-)
There are some Z566M's
On Jan 30, 8:30 am, Quixotic Nixotic nixci...@jsdesign.co.uk wrote:
That's terribly bad manners, Nick. Well done for contributing though.
John S
Indeed it is.
But I have to contribute a counter-balancing experience. I live about
50 miles away from Bletchley Park, so thought I'd make an
How much you paid for them? They are absolutely beast, the thing is
that i cant afford those, even if i could find some. I think they are
like $50 each now, correct me if im wrong.
Thats the thing, i have the Z566M. Id really like to find the Z5660M
do you know if the clear tubes usualy sell for
I just finished reading the book The Man Who Invented The Computer, The
Biography of John Atanosoff By Jane Smiley. (I picked up the book on
E-bay for under 7 dollars) This is a very interesting book. (Though the
technical discussion on vacuum tube electronics leaves a lot to be
desired.)
J
Z568(0)M tubes go for as much as $400 now. Happened a couple of
weeks ago on Ebay. Quite insane. The usual street price is $150..$200 I
would say.
Jens
How much you paid for them? They are absolutely beast, the thing is
that i cant afford those, even if i could find some. I think they
I bought the Z568's many years ago for about 50 dollars each...even then I
thought that was expensive!! I've seen far more Z566's than their clear
counterparts on eBay, but they tend to fetch the same price...
Nick
Sent from my iPhone
On Jan 30, 2012, at 11:36, jb-electronics
Whoah, didnt know that, now i feel bit retarded for naming such a
lower price
On Jan 30, 7:36 pm, jb-electronics webmas...@jb-electronics.de
wrote:
Z568(0)M tubes go for as much as $400 now. Happened a couple of
weeks ago on Ebay. Quite insane. The usual street price is $150..$200 I
would
Whoah, didnt know that, now i feel bit retarded for naming such a
lower price. I must have messed it up with something else. Do you know
where they were actually used?
On Jan 30, 7:36 pm, jb-electronics webmas...@jb-electronics.de
wrote:
Z568(0)M tubes go for as much as $400 now. Happened a
Good question...I'm not the wrong side of 40 yet, so they were around
before my time..;-) I've heard people say the bigger tubes were used for
things like Railway clocks or industrial scales and things like that, but
I've never seen photos of them 'in action' as it were...anybody on the list
have
Id probably came if they still used nixies for clocks at train
stations. Just having to wait for a late train while watching the huge
glowing numerals would be so satisfying :D
On Jan 30, 8:18 pm, Nicholas Stock nickst...@gmail.com wrote:
Good question...I'm not the wrong side of 40 yet, so they
The book I cited above covers the inventors and builders of ABC, ENIAC,
Colossus, Z1 etc. It is a very interesting book.
Tim Laing
J. Presper Eckert and John Mauchly, designers of ENIAC really had a
run of bad luck. I read book on ENIAC. They followed that up with the
UNIVAC, for commercial
On Jan 30, 11:21 am, John Rehwinkel jreh...@mac.com wrote:
snip
What I came up with is a little nuts, and probably would do horrible things
to tube life, but I haven't tried it yet. I was thinking of using a circuit
like the General Radio 1538 Strobotac, which has a cute way of building up
Thanks for all your comments.
I think that if the tubes wouldn't strike for whatever reason, those
problems can always be solved in the software. Another thing that
might help striking them quicker in darkness is the 3 backlight LEDs,
I can let a small current flow through them while the tubes
It is safe to say that anyone who has worked with vacuum tubes will tell
you, Don't do it!
Here are three reasons:
1. The tube leads are not consistently plated at the tube exit point, so
expect to not be able to use more than half of the tubes that you buy.
I've personally examined the
Michel,
you need something to ionize the gas atoms inside your glass bulb. I am
not sure if a simple LED will do the trick, usually you need energized
particles in the order of 60eV, that is electron volts, and a blue LED
will only give you 3 eV.
Jens
Thanks for all your comments.
I
On Jan 31, 8:18 am, jb-electronics webmas...@jb-electronics.de
wrote:
Michel,
you need something to ionize the gas atoms inside your glass bulb. I am
not sure if a simple LED will do the trick, usually you need energized
particles in the order of 60eV, that is electron volts, and a blue LED
Cosmic rays :-)
Jens
On Jan 31, 8:18 am, jb-electronicswebmas...@jb-electronics.de
wrote:
Michel,
you need something to ionize the gas atoms inside your glass bulb. I am
not sure if a simple LED will do the trick, usually you need energized
particles in the order of 60eV, that is electron
I guess in a dark room you usually have some kind of matter between the
sky and your tube thus diminishing the rate of ionizing radiation.
But yes, some parts of this ionizing radiation are caused by protons and
alpha particles that arrive here from the sun at decently high energies.
They
Hey,
It could be that many 3eV particles will have a
similar result as a few 60eV particles, it's all in quantum mechanics
I suppose.
quantum physics tells you that it actually will not work, sadly. You
need to have just the right energy in one particle (photon, that is).
Jens
On Jan
I always wondered about using a bit of Uranium glass...
Nick
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On Jan 30, 6:35 pm, jb-electronics webmas...@jb-electronics.de
wrote:
Cosmic rays :-)
Actually, background radiation is enough, and that comes from a
variety of materials that surround us. But the usual source is just
light photons. Lots of it.
What happens is that it's all statistical... the
Its odd, for ages none of these were around, then a bunch have
appeared - I bought a sizeable lot a couple of months ago for a few
bucks each, but they have gone for USD 100+ in the past - I know that
at least one other list member has a sizeable batch too.
They are great fun, but require a hight
Gaston,
OTOH, cosmic rays are not bothered much for a couple flimsy concrete
blocks :)
you are right about that :-) But during night time the sun does not work
as a decent source anymore because 12000km of stone are a pretty good
shield, at least for solar particles. Then again, Nixie
But it has to be something different from light that is scarce in dark rooms
since gases have an ionization energy of roughly 60...100eV and ordinary
light photons will not do the trick.
Since it's easily demonstrable that visible light does encourage ionization, it
is apparent that photons
On Jan 31, 5:57 am, Cobra007 mic...@xiac.com wrote:
You could convert a battery voltage to a nixie voltage relatively easy
with a MAX771 circuit. It will only not give you the maximum
efficiency. What I have done is basically design a circuit (using
multiple ICs) that together function in a
Hello,
I'm moving on with my project ( http://tinyurl.com/84xxv8p )
It's almost done (hope I can share picture soon) ; the only issue is
coming from the wall wart I use which is a first price product and is
very noisy.
Is there any certification or specification to ensure the product is
low
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